Only drawback, the metal tab supposed to pinch the umbrella is poorly designed, it takes up too much space and it is impossible to return the stem. Solution: turn the tongue a Phillips shot, and simply tighten the side screw.
Tip: the stem of the umbrella likely to be pressed by the side screw, insert the metal tab by holding a finger over time tightening.
Apart from this detail: 3,01 euros! Compare with other products offered ...